The idea that a white American can't understand non-white non-American views, makes the same amount of sense the other way around. Both ways around need a great deal of research by the ones trying to understand, and I believe she's tried her best.
I'll go even further and say that she understands some things better than those in the culture she's covering, since she's an outside observer, giving her some objectivity that those inside can't have. I know I have this with the particular "white" culture I'm integrating into right now.
I will say that there are some things she'll find difficult to impossible to grasp -- and might not even realise she's missing -- but to say she's not even allowed to try belittles us as human beings. This exclusionary race mentality can go away.